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US 8,493,465 B2 U.S. PATENT DOCUMENTS 2002/0196346 A1* 2003/0016862 2003/0034986 2003/0184779 2004/0141069 A1 A1 A1 A1 12/2002 Nishio et a1. ............. .. 348/2072 2004/0228523 2004/0228524 2005/0168596 2005/0169523 2007/0058186 A1 A1 A1 A1 A1 * cited by examiner 11/2004 11/2004 8/2005 8/2005 3/2007 Hibi et a1. Okutsu et a1. Ito et a1. Hayaishi Tanaka